Electric terminal connecter



A ril 18, 1933. w. e. HARTWIG ELECTRIC TERMINAL CONNEC TER Filed April 2, 1952 Patented Apr. 18, 1933' WILLIAM G; HARTWIGLQF cn xoaeq mnnvors, n'ssre'non 'rro RAILWAY U'rILrrircoM- rm, 'oncrrroneo, ILLINos, A oonrom rron or ILLINOIS EhnotrnrcjrnnMrNA conundrum Application filecl a 2;

This invention relates to improvements in; electrical terminal connectersi'and particularly to such connecters as are used in association with electric car heaters as disclosed. in my application, Serial No. 597,101,,filed March 7,1932. a c

It is an object of thepresent invention to i provide a self-locking binding post for extension. i v- It is further an object of thepresentin-. vention to provide a stamped metal body member adapted for clamping an end of the terminal extension and adapted to form a seat against which the wire is clamped by the head of a threaded binding screw, the metal body member having resilient fingers in thrust engagement with the threaded portion of said screw.

Further objects and advantages of the present invention will be more readily apclamping a wire to an electrical terminal parent from the following description taken in connection with the attached drawing, in which l Figure 1 is a plan View partially in sec? tion showing a pair of terminal extensions and a pair of self-locking binding posts associated therewith; V

Figure 2 is a broken section taken trans 'verscly of Figure l; r

Figure 3 is an end view of the metal body member forming a part of the terminal con-' nection;

Figure 4 is a top View of the metal body member showing the binding screw in section;

Figure 5 is a vertical section of the metal body member showing the association therewith of the binding screw Figure 6 is a view similar to Figure 5 f except that a wire and a terminal extension are shown connected therewith, and

Figure 7 is a bottom view ofthe metal body member.

The improved design of electrical lead-in and connections thereto is shown :in the drawing in association with a portion of a car heater. The bracket 10 supports one end of a resistance unit 12 which is attached by screw bolt 14 and nut 16. The resistance 1932. Serial No. e02,711;.

unit is spaced from the bracketlO anjdinsulated therefrom by bushing 18 and a secondbushin'g 20 which passes through the endwof resistance unit into the bushing 18,

andserves; toinsulate the connection from, I

the screw bolt 14. The resistance' unit has a pair of spaced contacts 22 24, "each of which is provided 7 with an upstanding threaded stud 26-. The terminal extensions; 28 and 30 are formed of thin pressed metal,

channelfshaped in' cross section, having dea pending flanges 32. The extensions erase, cured to,the contact terminals of the re- 7 sistance unit'through-nuts 34 ,which are rev ceived within openings at the ends of the ex;

' tensions 28 and 30. The nuts 34 are peened over at-their. upper ends as shown atl35'to, securely hold the ends of the extensions 28 and 30. The terminal extensions 28 and30 pass through an insulating block 36 which! is supportedby the plate 38 of the heater and by, the wall 40 which is spaced there-I from. I e n s g The wire connectionsto the terminal exten-- sions 28 and .30 are made throughthe-provie sion 'of a novel form of clamping devicenas shown in detail, Figures 3 to 7 A pressed 7 metal clamping piece, generally designated" 42 is-formed with a confining seat 43 for th connecting wire 44. The seat 43 ispartially surrounded by an arcuate upstanding wall 45 The seat 43 has an opening 46 for the passage of the screw bolt 47. The screw bolt 47 has an enlarged head 48 adapted to tightly clamp. the bent end of the wire 44 against the clampingseat 43. .The bottom part 49 of the clamping piece 42' is bentinto,

position, substantially parallel to butjspaceid from thebottom side of then/Wire clampingf seat 43, as shownby the space 50 in Figure 5 The metal piece 42 is therefore substantial- 1y: U-shaped in form. The space 50 is adapt-ff v of the; terminal extensions, such as 28. The; width'of the part 49, as shown the bot tom View of Figure 7 is such as to closelyv fit betweenthe flanged edges .32 ofvthe ex tension 28. .A pair of tongues .5151 are pressed out of the part 49 and areadapted tobear at'theiri ends 52 in engagement with ed to receive the channel Shaped end of one.

v the threaded portion of the screw bolt 47.

47 the connecting wire is clamped tightly upon its seat and the terminal extension is clamped tightly between the top and bottom walls of the clamping piece 42.

I claim: 7 g I 1. In combination, a threaded binding post having a wire clamping head, a pressed 'metal electrical connecter having a cupshaped seat for receiving an end of" the wire adapted for clamping thereto-by the head of the binding post, said pressed metal .Inember having a pair of resilient fingers in opposed relationship adapted to bear in thrust engagement with the threaded portion of saidbinding post for locking the parts in engagement. 1

2. An electrical connecter for securing a wire to a metallic terminal extension comprising, a pressed metal member substanhead adapted-to freely pass through theopening in said last-mentioned leg whereby the wire end may be clamped by the head of said binding post against said leg, said resilient fingers of the other leg being adapted to bear in thrust engagement against the threaded portion of said binding post on the other side of said terminal extension whereby said terminal extension is'tightly clamped between the U-shaped legs of said pressed metal member.

Signed at Chicago, Illinois, this 30th day of March, 1932. 1

r WILLIAM G. HARTWIG.

tially U-shaped inform, adapted to fit over an end of the terminal extension, the upper part of said pressed metal member forming a cup-shaped seat for the securement of the wire thereto and a threaded binding post having an enlarged wire clamping head adapted to extend through an opening in the upper part of said pressed metal member and through an opening in said terminal extension, said pressed metal member having a pair of resilient 'fingers pressed out of the lower part thereof in thrust engagement with the threaded portion of said binding post on the lower side of said terminal extension.

3. An electrical connecter betweena wire and a substantially channel-shaped metallic terminal extension comprising, a substantially U-shaped metal member, one leg of which is formed to fit into the channelshaped portion of said terminal extension, the other leg of which is adapted to lie on the other side of said terminal extension, a threaded binding post adapted to extend through both legs of said pressed metal member and through an opening of said terminal extension, said binding post having an enlarged head for clamping an end of the wire against the upper face of the pressed metal member and the otherleg of said pressed metal member having a pair of resilient fingers adapted to bear in thrust engagement against the threaded portion of said binding post.

4. An electrical terminal connecter for se- 

